30 



TABLE 3-3. Mean Cu levels in tissues of cattle 

 supplemented with three sources of Zn (mg/kg, DMB a 



Tissue b 



Control 



ZnMet 



ZnS0 4 



ZnO 



SEM 



Bone 



6 



6 



5 



6 



1.4 



Bone Marrow 



28 



30 



28 



30 



7 



Hair 



6 



6 



6 



6 



.9 



Hoof 



2.2 



1.9 



2.0 



2.2 



.8 



Kidney 



17 



17 



16 



16 



3 



Liver 



172 



163 



215 



150 



56 



Muscle 



4 



4 



4 



4 



1 



Pancreas 



4 



4 



5 



5 



1 



a DMB= Dry matter basis, bone also fat free basis. 

 b No difference among treatments (P > .05) . 



TABLE 3-4. Mean metallothionein levels in tissues of 

 cattle supplemented with three sources of Zn (|ig MT/g a 



Tissue 1 ' 



Control 



ZnMet 



ZnS0 4 



ZnO 



SEM 



Liver 



140 



125 



108 



139 



57 



Kidney 



68 



63 



63 



56 



19 



Pancreas 



43 



46 



29 



44 



18 



a Jig MT/g= \ig of Metallothionein per gram of wet tissue. 

 b No difference among treatments (P > .05) 



unsupplemented control. Copper concentrations of the tissues 

 did not drop in the supplemented treatments as might have been 

 expected when compared to controls and stayed similar 

 throughout treatments and within tissues. 



